# A334978 (b-file synthesized from sequence entry) 0 0 1 0 2 6 3 52 4 409 5 3208 6 25484 7 205452 8 1679332 9 13894848 10 116193246 11 980658172 12 8343605534 13 71492410640 14 616418176920 15 5344364518140 16 46565472754044 17 407529832131712 18 3580911446989368 19 31579384975219920 20 279414033129153065 21 2479725948121016040